<template>
<div>
  <div class="search">
    <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音" />
  </div>
  <div class="search-content" ref="search"
    v-show="keyword">
    <ul>
      <li class="search-item border-bottom" v-for="item of list" :key="item.id"
      @click="handleCityClick(item.name)">
        {{item.name}}
      </li>
      <li class="search-item border-bottom" v-show="hasNoData">
        没有找到匹配数据
      </li>
    </ul>
  </div>
</div>
</template>

<script>
import BScroll from 'better-scroll'
import {mapMutations} from 'vuex'
export default {
  name: 'CitySearch',
  data() {
    return {
      keyword: '',
      //list用来存储筛选后符合条件的城市
      list: [],
      timer: null
    }
  },
  props: {
    cities: Object
  },
  watch: {
    keyword() {
      if(this.timer) {
        clearTimeout(this.timer)
      }
      if(!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for(let i in this.cities) {
          this.cities[i].forEach(value => {
            if(value.spell.indexOf(this.keyword) > -1 ||
                value.name.indexOf(this.keyword) > -1) {
                  result.push(value)
            }
          })
        }
        this.list = result
      },100)
    }
  },
  mounted() {
    this.scroll = new BScroll(this.$refs.search,{
      observeDOM:true // 记住这一行
    })
  },
  computed: {
    hasNoData() {
      return !this.list.length
    }
  },
  methods: {
    handleCityClick(city) {
      // this.$store.commit('changeCity',city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  }
}
</script>

<style lang="stylus" scoped>
  @import '~style/varibles'

  .search
    touch-action: pan-y
    height: .72rem
    padding: 0 .1rem
    background: $bgColor
    .search-input
      box-sizing: border-box
      width: 100%
      height: .62rem
      padding: 0 .1rem
      line-height: .62rem
      text-align: center
      border-radius:  .06rem
      color: #666
  .search-content
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666
</style>
